Electrically-heated stamping-press.



L. AIRHART. ELEGTRIGALLY HEATBD STAMPING PRESS.

` APPLICATION FILED DEG. 3.15.9213` 1,099,892. Patented June 9,1914,

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LEWIS AIRHART, 0F WEST READING, PENNSYLVANIA, AS'SIGNOIR. TO TEXTILE MACHINE WORKS, OF AWYOMISSING', vPIErNNS,YLVANIA, A CORPORATION O'F PENNSYLVANIA.

Tall whom t may conc-cm Be it known that I, Lewis AIRHART, a citizen of the United States, residing at West Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Electricall -Heated IStamping-Presses, the fo lowing is al specification.

My invention relates to thatV class of stamping machines in which a reciprocatively mounted die or presser plate is employed in connection With means for electrically heating the latter; and it consists in an improved construction in Which a sel'fcontained means for regulatin the electric heating is conveniently embo ied, as fully described in connection with the accompanying drawings and specifically pointed out in the claims.

Figure 1 is a partly sectional elevation .of a 'mechanism embodying my invention. Fig. 2 is a cross-sectional view on the line 2-2 of Fig. 1. i

My im roved mechanism comprises a supporting ame or standard 2, which may xed to any convenient table 3, and a flexible conductor 4 conveniently attachable by means of a socket` to anyincandescent circuit in (place of an ordinary lamp; and any require regulation of the current for securing a pro-per heating ot the presser plate or die 6 is provided for by self-contained means so that the mechanism 'may be conveniently employed independently of any fixed provision for such regulation.

In the vertical frame 2 is mounted a crosshead 10, having a lateral projection 11 which is engaged in a guide-Way 12 of the frame, and a fixed vertical guidewrod 13 extending bothA above and belowl said cross-head through alined guide apertures 14 and 15 at theJ top and bottom of the trame; reciproeating movement being imparted thereto, as indicated, by means of a treadle 1G and a spring 17. To this cross-head is fixed a horizontal carrier afm A end a fixed vertical holder 21 with the die or presser plate 6 adjustably fixed to the re duced lower end.

The die holder 21 is preferably formed ot' Speciiication of Letters Patent.

of Whichv mov able' 20, having at its outery Patented J niiet), 19.14.

Application iiled December 3, 1913. Serial No. 804,341. Y

lcopper or like material, and is inclosed byan electric heating coil 25, which is preferably Wound upon a layer of mica and coveredby a layer of asbestos, While the convolutions the coil are .suitably insulated as by silicate of soda and the ends thereof are connected respectively to Wires 29 and 3.0 through rings 31 and 32, so that the passage of an electric current will heat the die The carrier arm 20 is inclosed by a similarly insulated coil 35; the covering of asbestos however bein omitted on the latter, and one end thereo being connected at 36 with Wire 29 extending to the heating coilV 25, While a conductor ring 37 adjustably slidable thereon is connected to a Wire 38.

joining with the Wire 30 to form the flexible conductor 4 to the source of electricity. The

construction described thus provides a selfcontained adjustable resistancel through which more or less of the current is conveyed to the heating coil 25 as determined by the conditions of operation.

The flexible conductor 4 is fixedly connected to the top of the cross-head guide rod 13, so that jthe Wires and 38 are maintained in fixed relation to the carrier arm 20 and die holder 21 duringl operation of ythe machine; and'said conductor 4 provides the only attachment required for operation of t machine, convenient adjustment of the conductor ring 37 upon the resistance coil 35 varying the heat imparted to the die plate 6 as desired. A

What I claim is 1. In combination with a vertical supporting frame, a vertical die-holder having a horizontal carrier arm reciprocatively guided in said frame, a heating coil on said die-holder, a resistance coil on said carrier arm, a4 regulator adjustable upon said re sistance coil, and electric connections to said heating and resistance coils substantially as and for the purpose set `forth.

-2. In combina-tion With a supporting frame having guide-Ways, a reciprocating crosshead having a fixed vertical rod and a lateral projection respectively engaged in said guide-ways, a horizontal carrier arrnrigidl fixed to said cross-head, a die-holder vertically fixed to the free end of said carrier In testimony whereof, I ali'x my signal arm, resstance and hatng coils on Sald ture in presence of two Witnesses.

carrier arm an de-hol er arm respective y T x and electric connections to said coils attachecl LEVLS ARHART' CHAS. M. HUBER, W. L. DAVIS.

5 to the projecting upper end of Said vertical i Witnesses:

V pose set forth. 

